New tests for COVID-19 (7-day smoothed). For countries that don’t report testing data on a daily basis, we assume that testing changed equally on a daily basis over any periods in which no data was reported. This produces a complete series of daily figures, which is then averaged over a rolling 7-day window ***
##### new_tests_smoothed_per_thousand COVID-19 (7-day smoothed).given as a rolling 7-day average (this is the inverse of positive_rate)
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